trail.h

   1 #ifndef TRAIL_H
   2 #define TRAIL_H
   3
   4 #include "skaterift.h"
   5
   6 typedef struct trail_system trail_system;
   7 typedef struct trail_point trail_point;
   8 typedef struct trail_vert trail_vert;
   9
  10 struct trail_system {
  11    struct trail_point {
  12       v3f co, normal, right;
  13       f32 alpha;
  14    }
  15    *array;
  16
  17 #pragma pack(push,1)
  18    struct trail_vert {
  19       v4f co; /* xyz: position, w: alpha */
  20    }
  21    *vertices;
  22 #pragma pack(pop)
  23
  24    i32 head, count, max;
  25    GLuint vao, vbo;
  26
  27    /* render settings */
  28    f32 width, lifetime, min_dist;
  29 }
  30 static trails_test = {
  31    .width = 0.25f,
  32    .lifetime = 5.0f,
  33    .min_dist = 0.5f
  34 };
  35
  36 static void trail_alloc( trail_system *sys, u32 max );
  37 static void trail_system_update( trail_system *sys, f32 dt,
  38                                  v3f co, v3f normal, f32 alpha );
  39 static void trail_system_debug( trail_system *sys );
  40 static void trail_system_prerender( trail_system *sys );
  41 static void trail_system_render( trail_system *sys, camera *cam );
  42
  43 #endif /* TRAIL_H */